EFFECT OF COLD STRESS ON PSII EFFICIENCY OF DUNALIELLA USING CHLOROPHYLL A FLUORESCENCE KINETICS

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PAEIZI M.; SHARIATI M.

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Journal: JOURNAL OF CELL & TISSUE Year:2012 | Volume:2 | Issue:4 Page(s): 395-405

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Title

EFFECT OF COLD STRESS ON PSII EFFICIENCY OF DUNALIELLA USING CHLOROPHYLL A FLUORESCENCE KINETICS

Author(s)

PAEIZI M. | SHARIATI M. | Issue Writer Certificate

Keywords

COLD STRESSQ2

DUNALIELLAQ2

PHOTOSYSTEM IIQ2

CHLOROPHYLL A FLUORESCENCE KINETICSQ2

Abstract

The first location of COLD STRESS effect on PSII in plants and algae is not fully clear. Therefore, the effect of low temperature (8°C) on the activity of different parts of PSII were investigated in D. salinaas plant model system is investigated using CHLOROPHYLL A FLUORESCENCE KINETICS.Material and methods: In this study unicellular green alga, D. salina, 200 UTEX strain was used. The Algae were cultured in the medium containing 1 M of NaCl at 8oC or 25oC in triplicates. Then the parameters of Chl-a fluorescence was measured in various interval after COLD STRESS.Result: The results showed that at temperatures 8°C, the rate of parameters FV/Fo, jPo, yo, jEo, jRo and PIABS in the species D.salina were decreased in comparison with the control (25°C). Whereas, the rate of parameters jDo and ABS/RC were decreased.Conclusion: According to the results, decreasing of efficiency of water-splitting complex under low temperature stress probably has a significant effect on electron transport to the PSII electrons acceptors and creates imbalance in activity of PSII electron transport chain. The effect of COLD STRESS on water-splitting complex, in turn, seems to decrease the rate of electron transport to Pheophytin and QA and from QA to QB, plastoquinone pool and finally reduction of end acceptor at photosystem I electron acceptor side. It could be finalized that the water-splitting complex is the first site that is affected by COLD STRESS in PSII of D. salina cells.

Cites

EFFECT OF PACLOBUTRAZOL AND PIRIFORMOSPORA INDICA INOCULATION ON ANTIOXIDANT ENZYMES ACTIVITY AND MORPHOLOGICAL CHARACTERISTICS OF GREEN BEANS (PHASEOLUSE VULGARIS L.) IN CHILLING STRESS

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APA: Copy

PAEIZI, M., & SHARIATI, M.. (2012). EFFECT OF COLD STRESS ON PSII EFFICIENCY OF DUNALIELLA USING CHLOROPHYLL A FLUORESCENCE KINETICS. JOURNAL OF CELL & TISSUE, 2(4), 395-405. SID. https://sid.ir/paper/188948/en

Vancouver: Copy

PAEIZI M., SHARIATI M.. EFFECT OF COLD STRESS ON PSII EFFICIENCY OF DUNALIELLA USING CHLOROPHYLL A FLUORESCENCE KINETICS. JOURNAL OF CELL & TISSUE[Internet]. 2012;2(4):395-405. Available from: https://sid.ir/paper/188948/en

IEEE: Copy

M. PAEIZI, and M. SHARIATI, “EFFECT OF COLD STRESS ON PSII EFFICIENCY OF DUNALIELLA USING CHLOROPHYLL A FLUORESCENCE KINETICS,” JOURNAL OF CELL & TISSUE, vol. 2, no. 4, pp. 395–405, 2012, [Online]. Available: https://sid.ir/paper/188948/en

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